The transmission modulator valve sets the correct pressure in the transmission to prevent harsh shifts. A leaking or failing valve should be replaced to restore shift quality. It is important that the factory recommended installation procedures are followed in order for the transmission to shift correctly.

722.3 and 722.4 transmission were used in most Mercedes vehicles from 1981-1995. The most common leak occurs from the front pump seal and shifting issues occurring from a loss of vacuum signal. It is very important that the engine is operating properly and the vacuum system is tested thoroughly if you observed shifting issues such as slipping or harsh shifting.

What If I Need to Return This Item?
Not a problem! If you are not happy with your purchase, we will gladly help you exchange or return your items, provided you follow the guidelines outlined in our Returns Policy.